Sound recording and reproducing apparatus



Dec. 29, 1931. H. wARw lcK 1,339,187

scum) RECORDING AND REPRODUQING APPARATUS v Filed Aug. 11, 1950 ii iiiiiji Y Patented Dec. 29, 1931.

, UNITED STATES PATENT OFFICE.

HAROLD L. WARWICK, OF FORT WORTH, TEXAS, ASSIGNOR OF ONE-HAL F TO GEO. 1B.

MCCARNEY, 0F HANDLIEY, TEXAS soon nnoonmne AND nnraonucnre APPARATUS Applicationfiled August 11, 1930. Serial No. 474,632.

indefinite number, and to make such re cording and reproduction much more economical. The expensive (1180 records and films are d1spensed with and the expensive needles are. Other objects .and advantages;

eliminated. will be fully explained in the following description" and the invention will be more particularly pointed out in the claims. t

' Reference is had to the accompanying drawings which form a part of this application.

- Fig. 1 is a diagrammatic View of the recording and reproducing apparatus, showing means for making a pluarlity ofrecords, and means for demagnetizing or erasing the original record.-

Fig. 2 is a diagrammatic view of a record.-

' ing 'and reproducing apparatus.

Fig. 3 is a perspective view' of a .cabinet with the improvements applied therein.

Similar characters of reference are psed to indicate the same parts throughout the several views.

The aparatus-isprovided with a supporting base 1 and bearing members 2 and spools 3 and 4 are journaled in these bearing members. Upright guideljmembers 5 and 6 are provided and these guidemembers are provided with slots 7 forthe passageof the recording wire 8. At the commencementof a recording operation, a spool 3 is provided with a wire 8. The spools i3 are carried'in' stock and ready for operation. The wire 8 is drawn ofli of spool 3 by any form of motor power and rolled on the spool 4. The spool 4 is provided with a shaft and a gear wheel 9 is rigid therewith and meshes with apinion 10 which is provided with a shaft 11 to be driven by any suitable power. When the wire is passing from the spool 3 it is drawn through slot 7 in upright memberb and tension means are provided for engaging the wire 8for controlling the speed of the passage of the wire 8 through the member 5. The wire 8 in leaving spool 3 to be wound on spool 4: passes a series of electromagnets. The first magnet 12 is provided for recording the sounds which come from the transmitter 13. The sound passes through wire-14 and battery 15, thence through a wire 16 through a transformer 17 and a wire 18.to the-magnet. 12. The circuit is completed by wire 19 '50 which passes through the transformer 17 and back tov the transmitter 13. The Wire 19 is provided with a switch 20 for opening or closing the transmitter. A switch-21 is rovided for opening and closing the soun ing or reproducing devic e.f This device consists of an amplifier 22 and a load speaker'23 connected in series with the transformer 17. By opening switch 21 and closing switch 20, the

' sounds will be recorded by magnetism on the wire 8 as the wire passes through the magnet .v 12. By reversing, that is, closing switch 21 and opening switch'QO, the sound will be carried through the transformer 17 and amplifier 22 to the loud speaker 23 for reproduc- 'tion. A series of magnets 24 are provided and the wire 8 runs through'the magnetic field of the magnets 24:. Wires 25 are electrically connected, withv magnets 24. Only one illustration of making permanent records is shown in Fig. 1. The wires 25'are electrically connected to the magnet 26. A

wire 27 is run throu h the magnetic field-of the magnet 26 to'ma ea permanent record. It will be understood that wires may connect spools are thus magnetized and the wires are spools. A single spool can be prepared with the records formed therein by the magnetism as above described,-to afford an evening entertainment and it will not be necessary to change the records every four or five min utes. A spool 4 can be prepared With messages or musical impressions which will run 400 minutes or more if required. The metallic coating of-the Wire will-maintain the wire and the magnetic properties therein in condition to be reproduced. ;The coating protects the'windings of the wire against adjacent windings of itself. After the me-' tallic coating has been placed on the Wire an enamel coating is placed on the 'metallic coating. I

I have produced a simple and portable apparatus that requires no expensive or complicated or bulky machine and which may be used in any ordinary lecture room or hall to make a permanent record of music, lecture or speech, and afterwards reproduce this lecture 01 music amplified by any ordinary radio set andreproducedas many times as desired and that copies may be made simply on cheap spools of ordinary steel wire and sold in any book or department store for a nominal sum. The length of wire in any one spool is of sufiicient length to ,contain as many,

hours of speech or music necessary at one recording. What I claim,-is,- v 1. A sound producing apparatus comprising a spool of magnetized wire, a metallic coating inclosing said wire, an enamel coating inclosing said metallic coating, said wire containing variable sound producing properites, and means for converting said prop- 'erties into sound.

2. A sound producing apparatus comprising a spool of'wire, a metallic coating inclosing said wire, means 'for magnetizing said wire and means for simultaneously creating sound producing properties in said wire in eluding a sound transmitter. .3. Asound producing apparatus comprising a spool of wire, a metallic coating for said wire, an enamel coating for said metallic coating, means for. magnetizing said wire and means for simultaneously varying the magnetic flux in said wire including a sound transmitter. 4. A sound recordingand reproducing apparatus comprising a spool of wire, means for magnetizing said wire and means for simultaneously creating variable sound pro- ,duc'ing properties in said wire, a metallic coating for said wire, and electrical means for converting said properties into sound. Ill-testimony whereof, I set my hand, this 6th day of Au st,'1930. OLD L.- WARWICK.- 

